#include<stddef.h>
#include<stdio.h> 
struct s
{
	char a;
	int c;
	int b;
};
#define css(a,b) a d;printf("%d\n",(char*)&(d.b)-(char*)&(d))
int main()
{
	css(struct s, b);
	printf("%d\n", offsetof(struct s, b));
	return 0;
}
